Dell may already have a 23-inch multi-touch display, but if you're looking for something a little smaller and cheaper, then we have good news for you. The company informed us of its new model named "S2240T," a 21.5-inch touch monitor with the same 1,920 x 1,080 resolution as its larger sibling. It also stands on a sliding base that can tilt as much as 60 degrees, but unlike the other model this one can't lay flat. Other features inc